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Significance of root hairs at the field scale – modelling root water and phosphorus uptake under different field conditions

Significance of root hairs at the field scale – modelling root water and phosphorus uptake under different field conditions
Significance of root hairs at the field scale – modelling root water and phosphorus uptake under different field conditions
Background and aims: root hairs play a significant role in phosphorus (P) extraction at the pore scale. However, their importance at the field scale remains poorly understood.

Methods: this study uses a continuum model to explore the impact of root hairs on the large scale uptake of P, comparing root hair influence under different agricultural scenarios. High vs low and constant vs decaying P concentrations down the soil profile are considered, along with early vs late precipitation scenarios.

Results: simulation results suggest root hairs accounted for 50% of total P uptake by plants. Furthermore, a delayed initiation time of precipitation potentially limits the P uptake rate by over 50% depending on the growth period. Despite the large differences in the uptake rate, changes in the soil P concentration in the domain due to root solute uptake remains marginal when considering a single growth season. However, over the duration of six years, simulation results showed that noticeable differences arise over time.

Conclusion: root hairs are critical to P capture, with uptake efficiency potentially enhanced by coordinating irrigation with P application during earlier growth stages of crops.
Modelling, root hairs, phosphorus, Field scale
0032-079X
Ruiz, Siul Aljadi
d79b3b82-7c0d-47cc-9616-11d29e6a41bd
Koebernick, Nicolai
118c4e45-02d8-42da-84c8-8ee4fac140ad
Duncan, Simon, Jack
fa8481c1-3788-41a0-a304-02515b93ef7d
McKay Fletcher, Daniel, Marcus
60e9adeb-182b-4dfd-846a-b684f8e2358e
Scotson, Callum, Paul
47901c28-548c-41cc-9cbd-f0429a24c7cb
Boghi, Andrea
54a72da6-c8a2-468c-9773-897efac0638f
Marin, Maria
083b514a-a2d6-49da-86ae-5bc2350d1942
Bengough, Anthony G.
ac1f754e-002c-44f6-8907-8771a4cd1fd3
George, T.S.
a506ae83-5218-40c6-b582-7243465df9fa
Brown, L.K.
c10f9ba0-4584-433a-bd87-926ab197a64b
Hallett, P.D.
b027edfe-728c-4d09-bbbd-4061e6373ef6
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe
Ruiz, Siul Aljadi
d79b3b82-7c0d-47cc-9616-11d29e6a41bd
Koebernick, Nicolai
118c4e45-02d8-42da-84c8-8ee4fac140ad
Duncan, Simon, Jack
fa8481c1-3788-41a0-a304-02515b93ef7d
McKay Fletcher, Daniel, Marcus
60e9adeb-182b-4dfd-846a-b684f8e2358e
Scotson, Callum, Paul
47901c28-548c-41cc-9cbd-f0429a24c7cb
Boghi, Andrea
54a72da6-c8a2-468c-9773-897efac0638f
Marin, Maria
083b514a-a2d6-49da-86ae-5bc2350d1942
Bengough, Anthony G.
ac1f754e-002c-44f6-8907-8771a4cd1fd3
George, T.S.
a506ae83-5218-40c6-b582-7243465df9fa
Brown, L.K.
c10f9ba0-4584-433a-bd87-926ab197a64b
Hallett, P.D.
b027edfe-728c-4d09-bbbd-4061e6373ef6
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe

Ruiz, Siul Aljadi, Koebernick, Nicolai, Duncan, Simon, Jack, McKay Fletcher, Daniel, Marcus, Scotson, Callum, Paul, Boghi, Andrea, Marin, Maria, Bengough, Anthony G., George, T.S., Brown, L.K., Hallett, P.D. and Roose, Tiina (2019) Significance of root hairs at the field scale – modelling root water and phosphorus uptake under different field conditions. Plant and Soil. (doi:10.1007/s11104-019-04308-2).

Record type: Article

Abstract

Background and aims: root hairs play a significant role in phosphorus (P) extraction at the pore scale. However, their importance at the field scale remains poorly understood.

Methods: this study uses a continuum model to explore the impact of root hairs on the large scale uptake of P, comparing root hair influence under different agricultural scenarios. High vs low and constant vs decaying P concentrations down the soil profile are considered, along with early vs late precipitation scenarios.

Results: simulation results suggest root hairs accounted for 50% of total P uptake by plants. Furthermore, a delayed initiation time of precipitation potentially limits the P uptake rate by over 50% depending on the growth period. Despite the large differences in the uptake rate, changes in the soil P concentration in the domain due to root solute uptake remains marginal when considering a single growth season. However, over the duration of six years, simulation results showed that noticeable differences arise over time.

Conclusion: root hairs are critical to P capture, with uptake efficiency potentially enhanced by coordinating irrigation with P application during earlier growth stages of crops.

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Accepted/In Press date: 13 September 2019
e-pub ahead of print date: 6 December 2019
Keywords: Modelling, root hairs, phosphorus, Field scale

Identifiers

Local EPrints ID: 434043
URI: http://eprints.soton.ac.uk/id/eprint/434043
ISSN: 0032-079X
PURE UUID: 375d7f9d-306d-4de4-a8c2-7c28288bbc46
ORCID for Andrea Boghi: ORCID iD orcid.org/0000-0002-9387-326X
ORCID for Tiina Roose: ORCID iD orcid.org/0000-0001-8710-1063

Catalogue record

Date deposited: 11 Sep 2019 16:30
Last modified: 07 Oct 2020 06:44

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Contributors

Author: Nicolai Koebernick
Author: Simon, Jack Duncan
Author: Callum, Paul Scotson
Author: Andrea Boghi ORCID iD
Author: Maria Marin
Author: Anthony G. Bengough
Author: T.S. George
Author: L.K. Brown
Author: P.D. Hallett
Author: Tiina Roose ORCID iD

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